[Xavier]

One can only play the Ethereal Combat game if one knows how the Ethereal plane works. Having the proper attunement or song affords the character this knowledge. Without it, you're stuck fighting soul to soul, restricted by your Precision (Sucks, dont it?).
This means Calabim would be tearing up the soul, not the mind, unless they knew how. This does make Calabim of Nightmares awful to the unprepared angel :P